I wouldn't hold your breath on this, or indeed start celebrating, even if it turns out to be true.... 9to5Mac believes that Sony BMG will soon begin offering their music catalog to Apple in the iTunes Plus format. iTunes Plus is Apple's marketing term for higher quality (256kbit) audio tracks without any copy protection (DRM). Apple first started selling iTunes Plus tracks from EMI in May, 2007. ...
Over a year after the "victory" with EMI, thousands of EMI tracks are still not offered in iTunes Plus format with no indication if they will ever be.
These announcements are all so Jobs can look good on stage and the partners can be happy that agreements are in place. In terms of the customers and in terms of actually converting the music to iTunes Plus, they have and will continue to fail horribly.
Even if the Macworld January announcement is or all the other companies as well and all music is now DRM free, it would still take Apple the better part of three or four years to convert the tracks at the rate they have been going.